EXPLIAN THE IMPORTANCE OF POLY PHASE CIRCUIT.

2105

On a 3 winding transformer YNynd11, how do you apply REF protection to the Delta tertiary winding that is supplying auxiliaries to a substation?

4323

what happen when we add mentos in cold drink?& why?

1998

The series field winding has low resistance while the shunt field winding has high resistance. Why?

1674

at what basis/standard we have to arrive the current density of aluminium/ copper in busbar?

2080

Mention the methods for starting an induction motor?

1102

what is the usage of microcontroller in the panel board?

2038

What is Negative Potential Bias

2239

how we can calculate power factor in single phase & three phase ?thank u

1962

What magnetic circuit is formed in berry-type constructions and why?

1020

What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

2012

what is arc flash and what are the hazards involved

2109

will 1050kva DG set withstand for back charge of 16MVA transformer

1811

HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

1916

what is the use of piston rings in the engine used for a generator...........

2155